<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>用户反馈</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            padding: 20px;
            background-color: #f9f9f9;
        }
        form {
            background-color: white;
            padding: 15px;
            border-radius: 5px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }
        textarea {
            width: 100%;
            height: 100px;
            margin-top: 10px;
        }
        button {
            margin-top: 10px;
        }
        .message {
            margin-top: 15px;
            color: green;
            display: none;
        }
    </style>
</head>
<body>
    <h1>用户反馈</h1>
    <form id="feedbackForm">
        <label for="feedback">您的意见：</label>
        <textarea id="feedback" required></textarea>
        <button type="submit">提交反馈</button>
    </form>
    <div id="successMessage" class="message">感谢您的反馈！</div>

    <script>
        document.getElementById('feedbackForm').addEventListener('submit', function(event) {
            event.preventDefault();
            document.getElementById('successMessage').style.display = 'block';
            document.getElementById('feedback').value = '';
        });
    </script>
</body>
</html>